Building on the pioneering work of Lighthill [1]} and Blake [2]}, the squirmer was rediscovered by Pedley
and co-workers.
They
used
the squirmer to model the nutrient uptake of spherical microswimmers [3]}, [4]},
the flow around swimming Volvox [5]},
the pairwise hydrodynamic interaction between two squirmers and between two Paramecia [6]}, [7]}, [8]},
collective motion of squirmers in bulk [9]}, [10]}, [11]}, [12]}, [13]}, in flow [14]}, [15]}, [16]}, and in a monolayer [17]}. Within the last ten years the squirmer
was also used
extensively
by other groups to study the persistent random walk of Brownian squirmers [18]},
optimal swimming efficiency and feeding [19]}, [20]},
finite Reynolds number locomotion [21]}, [22]}, [23]}, [24]},
unsteady squirming [25]}, the motion in a stratified or unsteady fluid [26]}, [27]},
propulsion in complex fluids [28]}, [29]}, [30]}, [31]}, [32]}, [33]}, fluid mixing [34]}, [35]},
collective motion [36]}, [37]}, [38]}, [39]}, [40]}, [41]}, [42]}, [43]}, [44]}, [45]}, the motion in bounded flows [16]},
motion under gravity [47]}, [48]},
motion in obstacle lattices [49]},
alignment in nematic fluids [50]},
motion near surfaces or in channels [51]}, [52]}, [53]}, [54]}, [55]}, [56]}, [57]}, [58]}, [59]}, [60]}, [61]} and squirmers in optical traps [62]}.
